Sib-Sets w/ my Favourites

What sib-sets would you create with my favourite names?
You can include middle names (1 or 2) either from my favourites or names that you'd think fit.
If you would like to voice your opinion on these names, feel free to do so.
Also any suggestions are welcome as I'm always on the hunt for more names to love

Suggestions: ALBA <3 Alba & Leonor are awesome together, Alba would be great with Flora, too. I love the meaning of Alma, too, if that interests you?
Eulalia
Seraphine
… basically the stuff in my signature

Teo Caspian & Felix Matteo (I say Teo as TAY-o, is that how you're saying it?)
Elliott Arthur & Felix Caspar
Augustus Charlie & Theodore Jack (ooh! It's not often you get the playful name in the middle… I like this vibe!)
August & Felix (very subtle virtue theme happening here. I like it!)
Leo & Artur
Caspian & Harper

Suggestions: I still think the ones in my sig fit in with your faves, so maybe some of those? Marius & Artur would be awesome together!

@lucialucentum
Wow, thank you. Many of these sets are stunning.
- I don't exactly pronounce Teo, TAY-o (I don't pronounce it english) but that would sound the closest to my pronunciation
- What exactly do you mean by "Euro" enough?
- Leonor and Ophelia / Ofelia as a sib-set is stunning. Do you think that Flora would go well with them?
- Also do you pronounce Leonor, Lee-oh-nor or Lay-oh-nor, as in Leo or in Teo?One more question: Could Leonor and Elliott work together?
From you list I really like Atlas, it's been growing on me for a while now.

And thanks to everyone for answering, I really love the sets you came up with